Additive dispenser for dishwashers



Oct. 19, 1965 T. KRZEWINA ADDITIVE DISPENSER FOR DISHWASHERS 3Sheets-Sheet 1 Original Filed Dec.

30 33 INVENTOR.

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ADDITIVE DISPENSER FOR DISHWASHERS Original Filed Dec. 31, 1962 3Sheets-Sheet 2 k n w Ff'a. 3

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ADDITIVE DISPENSER FOR DISHWASHERS Original Filed Dec. 31, 1962 5Sheets-Sheet 3 United States Patent 3,212,675 ADDITIVE DISPENSER FORDISHWASHERS Thomas Krzewina, Milwaukee, Wis., 'assignor to GeneralElectric Company, a corporation of New York Continuation of applicationSer. No. 248,744, Dec. 31, 1962. This application Dec. 11, 1964, Ser.No. 419,279 18 Claims. (Cl. 22270) This is a continuation of myapplication Serial Number 248,744, filed December 31, 1962, nowabandoned.

This invention relates to dishwashers, and in particular to apparatusfor adding a quantity of detergent to water at each of two dishwashingcycles and a charge of wetting agent to the final rinse water.

It is now well accepted in the dishwasher industry that two wash cycles,in each of which a washing solution is made by the addition of suitabledetergent to the water entering the dishwasher tub, produces superiorwashing results. It is also accepted that the addition of a wettingagent to the final rinse water improves the drainage of water from thedishes after the final rinsing operation, thus leaving a minimum ofwater to dry on the dishes during the ensuing drying cycle.

Present domestic dishwashers use two independent devices for introducingthe detergent and the rinse water conditioning agent. Although theindependent devices perform very satisfactory, there is in mostinstances a duplication of certain operational components and thereforeincreased opportunity for failure or malfunction. It is therefore aprincipal object of the invention to provide a unitized detergent andwetting agent dispenser having an operating mechanism which is common toboth units of the device.

It is another object of the invention to provide a combination detergentdispenser and wetting agent dispenser in which the operation cycles areestablished and controlled by a simple escapement mechanism which isactuated by the displacement of a stop arm under control of aconventional time cycle mechanism.

It is a further object of the invention to provide a dispensingapparatus which is operated from one to the next of its operationalcycles by an escapement mechanism powered by a spring in which energy isstored as the user returns the dispensing apparatus to a loadingposition in preparation for the next operation of the dishwasher.

It is yet another object of the invention to provide a compositedispenser for detergent and wetting agent which is easily loaded withthe materials to be dispensed and in which the detergent is protectedagainst being wet during operational cycles such as prerinsingoperations in which gross soil is removed from the dishes by a wateraction preliminary to the first actual washing action.

In a presently preferred embodiment of the invention as applied to adishwasher of the top loading type-that is, a dishwasher in which thedish receiving tub has an upwardly facing open top and a hinged lid orcover for the topthe device is positioned on a side wall of the tub,preferably near the top and near the front wall of the tub. Actually,the device is arranged to be mounted in an opening in said side wallwhereby the detergent dispenser portion is within the tub and thewetting agent dispenser and the actuating mechanism are on the oppositeside of the wall and thus in a protected location. It will beunderstood, of course, that the wetting agent dispenser has a passageleading into the interior of the tub for the discharge of the wettingagent thereinto.

The dispenser comprises a cylindrical structure having a diametrical weband other. wall means which provide two separate pockets for thereception of granular detergent. A rotatable cover is provided forpreventing water from splashing into either of the detergent pocketsdurice ing any washing operation. This cylindrical structure isnon-rotatably mounted on a shaft which extends horizontally through thetub wall fitting in which it is journalled for rotation. The portion ofthe shaft on the other side of the wall fitting-which places this shaftportion external of the dishwasher tubpasses transversely of a wettingagent receiving chamber which is fixed against rotation and providedwith a cover having an opening which accommodates the movement of ascooplike wetting agent dispenser, provides a facility for mounting theescapement triggering mechanism, and affords means through which thechamber may be filled. An escapement wheel, fixed on the shaft, isarranged to be rotated by a suitable spring mechanism. The wetting agentdispenser advantageously comprises an arm extending radially relative tothe shaft; said arm has at its end a scoop which is propelled instep-by-step fashion into and through the liquid wetting agent in thecup, and in a last arc of movement of the shaft, carries the wettingagent to a point where it escapes into a discharge passage leading tothe interior of the tub.

In a presently preferred form, the triggering device for the escapementconstitutes a bi-metal element mounted on the detergent cup cover andhaving a trigger extending into operative relationship with theescapement wheel. Through the heating effect of electrical energy, thebimetal element is flexed in one direction to a position releasing thewheel for predetermined arcuate movement; upon the interruption ofcurrent, the element cools for restoration to a second positionpreparing the escapement wheel for another rotation. By this simplemechanism, controlled rotation of the associated shaft causes first andsecond discharges of detergent into the dishwasher tub to form washingsolution for the first and second washing operations, and a final actionin which the wetting agent is released for flow into the tub and mixturewith the rinse water therein.

Other features and advantages of the invention will best be understoodfrom the following description of the presently preferred embodimentread inconnection with the accompanying drawings in which:

FIG. 1 is a perspective view of a presently preferred embodiment withbroken away portions of the fragmentarily shown side and top walls ofthe dishwasher to indicate the relationship of the device thereto;

FIG. 2 is a front elevation of the device with portion of the detergentcups and cover being broken away;

FIG. 3 is a side sectional elevation taken on line 33 of FIG. 2;

FIG. 4 is a top plan view of the device as mounted in the dishwasher tubwall, with said wall shown in section, the protective cover being in aposition permitting the loading of the cups and a part of the wettingagent dispenser cover broken away;

FIG. 5 is a fragmentary rear view of the escapement wheel and triggeringdevice, enlarged to show detail, with the wetting agent cup and itscover shown in section on lines 5-5 of FIG. 4;

FIG. 6 is a rear sectional view of the wetting agent cup and associatedmechanism taken on line 6-6 of FIG. 4 and showing the wetting agentscoop in its ultimate operating position;

FIG. 7 is a sectional elevation of the detergent cups taken on line 7-7of FIG. 4 showing the cups at the release of the first discharge ofdetergent;

FIG. 8 is a schematic wiring diagram; and

FIG. 9 is an abbreviated cam chart to show a simplified operationalcycle. 7

Referring first to FIGS. 1 and 3, my invention is illustrated in itsapplication to a dishwasher of the wellknown type having a substantiallyrectangular, opentopped tub. Such a dishwasher is illustrated, forexample, in Design Letters Patent 192,178, patented February 6, 1962,and assigned to my assignee herein. In a dishwasher of this type, thetub is disposed within an outer appearance cabinet of which wall 1 is anexternal side wall. The tub side wall 2 on which the dispenser ismounted is suitably spaced from the outer Wall to accommodate thedispenser mechanism later described; it is unnecessary for the otherthree side walls (not shown) of the tub to have this relatively largespacing from the adjacent cabinet walls. In any event, there is a topwall 3 extending between the tub walls and the external cabinet walls;this top wall is arranged to prevent any entry of water between the tuband cabinet walls. The tub has an open top and there is provided a rearhinged lid or cover 4 which has a peripheral gasket 5 seating againstthe top marginal wall 3. As is well known in the art, the lid isarranged to be secured by suitable latch means (not shown) which, whenthe lid is latched home, places the gasket 5 under compression to sealagainst the escape of liquid during a washing or rinsing operation. Itwill be understood that the dishwasher tub is provided with racks (notshown) for the accommodation of dishes and other articles to be washed,and that there are provided water inlet and discharge devices (notshown) by means of which water is admitted to and drained from the tubunder control of conventional time cycle mechanism (not shown). Also,there will be motor-driven impellers or other water distribution devices(not shown) by means of which washing and rinsing liquid is circulatedover the articles to effect a washing and a rinsing action. For purposesof illustration, it will be assumed that the time cycle controllerforexample, a controller of the type illustrated in Illian US. Patent2,668,589 of February 9, 1954, and assigned to my present assigneeisarranged to establish a cycle of operation which includes the fol--lowing:

1) Introduce water for a preliminary rinsing operation to remove grosssoil from the dishes and to purge the Water line of cold water therein;in this operation the drainage means is operative to provide acontinuous discharge of this liquid from the tub.

(2) With the drainage means inoperative, introduce a desired quantity ofhot Water into the machine.

(3) Actuate the dispenser triggering mechanism to introduce a charge ofdetergent into the tub to form the first washing solution.

(4) Either following or during this introduction of water, activate thewater impelling mechanism and continue such action for a desired Washingperiod.

(5) Operate the drainage mechanism to remove the spent washing liquidfrom the tub.

(6) Inactivate the drainage means and introduce another charge ofliquid.

(7) Actuate the dispenser triggering mechanism to introduce the seconddetergent charge into the tub to create a second washing solution.

(8) Activate the water impelling mechanism for a second washingoperation.

(9) Drain the spent second wash liquid.

(10) Inactivate the drainage mechanism and introduce a quantity of waterfor rinsing the dishes.

(11) Activate the triggering mechanism to introduce the wetting agentinto the rinse water.

(12) Actuate the water impelling means to effect a rinsing of thedishes.

(13) Actuate the drainage mechanism .to remove the rinsing liquid; and A(14) Activate some form of heating and air circulating means to dry thedishes while they remain in the tub.

This operational sequence is by way of example only and is well known tothose skilled in the art. Actually, there may be anon-wetting agentrinse between the first and'secon d wash, and one 'or more rinsesbetween the final one in which the wetting agent is supplied to the 4rinse water. Also, heating means within the tub may be energizedthroughout the operational cycle to prevent cooling down of the wash andrinse water. The precise operating schedule is not important to thepresent invention, nor are the actual mechanisms for admitting anddraining water or water circulation. Operational sequences and themethods of obtaining them are now so well known in the dishwasherart-both domestic and commercialas to make specific illustrationunnecessary.

As FIGS. 2 and 3 show, the detergent and wetting agent dispenser 10 hasa principal support structure which includes a dished mounting plate 11and a wetting agent reservoir 12. These may be molded in one piece. Aphenolformaldehyde condensation plastic such as Bakelite is excellentfor this structure. The plate 11 has a circular guide track 14 for aprotective cover and a wall 15 providing a circular pocket concentricwith an opening 16 which provides a shaft bearing. A cover 17 for thereservoir 12 is removably attached thereto; said cover has a wallstructure 18 which provides a rear bearing and serves to anchor anactuating spring, all as later described.

The opening 16 in plate 11 journals a shaft 20 therein. The forward part21 of said shaft is non-circular (see FIG. 3) and nonrotatably mountsthe detergent container 23. The rear portion 24 of said shaft is alsononcircular and nonrotatably mounts the escapement wheel 25. Said 'wheelhas a circular shaft extension 26 which is rotatably carried by the wall18. The shaft 20 is axially restrained by conventional means such as thesnap ring 26' and bearing washer 27, and a seal such as an O-ring seal28 is retained by the wall 15.

The detergent container 23is a substantially cylindrical structurehaving front and rear circular walls 30, 31, with a wall extendingtherebetween. As best shown in FIG. 2, this wall resembles a W with allportions 32 and 33, and a central web 34, providing open-topped cups35.1 and 35.2. It will be noted that whereas the wall 34 extendsradially to the periphery of the walls 30 and 31, the non-radial walls32 and 33 are arranged to provide each of the cups with a large topopening through which the cups may be filled with the detergent andthrough which the detergent empties into the tub at the appropriatetime. As shown in FIG. 3, the detergent container 23 is housed withinthe dished mounting plate 11 to minimize the projection of the containerinto the tub.

A cover 36 is mounted for rotation relative to the container 23. Asshown, the cover extends substantially below the diameter of thecontainer. At its front wall the cover 36 is journalled for rotation onan enlarged portion 37 of the shaft 20, and at its rear the cover has aflange 38 which rides on the circular wall 14. This flange 38 does notdefine a complete circle but rather an arcuate cut-out as indicated indotted line in FIG. 2. The weight disposition resulting from the shapeof the cover 36 is such as normally to urge it into counterclockwiserotation as viewed in FIG. 2; said rotation is restrained by theengagement of the flange 38 with a stop 40 extending radially of thewall 14 of the mounting plate 11. When in its home position the covercompletely shields the detergent cups against entry of water during anywashing or rinsing operation. To expose the cups for loading withdetergent, the user manually rotates the cover in a clockwise directionuntil it is in the inverted position of FIG. 1; the center of gravity isthen such as to retain the cover in such position, giving the userfreedom to place the detergent in the cups. Protection of the wettingagent cup and its associated escapement and operating mechanism againstwater contact is provided by suitably gasketing the tub wall openingthrough which the structure extends, as indicated by the gasket 41, FIG.3.

FIGS. 3, 4 and 5 illustrate the escapement wheel and its triggeringmechanism. A coil spring 43 has one end anchored in a diametric slot inthe hub 44 of the escapement wheel 25, and its other end is suitablyfixed to a pin 45 projecting from the wall 18. This spring is tensionedas the user manually rotates the detergent dispenser from its finaloperating position to its re-use position, as later explained. Undertension the spring exerts an effort to rotate the shaft in acounterclockwise direction as viewed in FIGS. 1 and 2. Rotation isresisted and controlled in step-by-step fashion by an electricallyoperating triggering device.

As shown in FIGS. 4 and 5, the escapement wheel is essentially a cuphaving an annular space defined by the outer rim 46 and the innerratchet wheel 47. These parts are integral with each other and there isa radial web 48 extending therebetween. The rim 46 is formed with twoteeth 50 and 51 which with the web 48 established the two dischargepositions of the detergent container and the final movement of thewetting agent scope arm 52, as later described. The teeth 50 and 51 haveradial leading edges, respectively 50.1 and 51.1, and sloping trailingedges, respectively 50.2 and 51.2. The ratchet wheel 47 has threeratchet teeth, respectively 53, 54 and 55, which also have radialleading edges and sloping trailing edges. The apexes of the respectiveseries of teeth 50, etc, and 53, etc., are spaced sufficiently toprovide an annular channel only slightly greater than the thickness ofthe triggering finger 56 which extends into the escapement wheel, asshown in FIG. 4.

The triggering finger 56 comprises the tip end of a block 57 ofinsulation material, said block being affixed to the free end of amember 58 mounted in an insulating terminal block 60 fastened to thecover 17 in a pocket provided therefor. The member 58 is essentially alever rotatable about its point of attachment to the cover 17. Asillustrated, the member 58 is a bi-metal structure, arranged to beelectrically heated; specifically, it is heated by the passage ofelectric current therethrough, as later explained. In its cold state thebi-metal assumes the solid line position of FIG. 5, in which positionthe finger 56 is in the path of rotation of the ratchet wheel tooth 53.so as to latch the escapement wheel against movement under the urgingof spring 43. As it flexes on heating, the bi-metal member disengagesfinger 56 from tooth 53 and interposes the finger 56 in the path of thetooth 50 on the inside of the rim 46; when in such position the fingeroperates to stop rotation of the wheel 25.

In completion of the general description of the escapement and wettingagent dispenser, it is noted that the arm 52 extends generally radiallyfrom the wheel 25 and has at its outer end, wall means forming the scoop62, the function of which is to scoop up a quantity of the wetting agentand direct it into a cup-like structure 63. The capacity of the scoop 62is greater than that of the cup 63; its exact relationship is not ofimportance, for most of the excess of wetting agent will return to thereservoir 12 before that which is deposited in the cup 63 has drainedthrough the passage 64 which terminates in the opening 65 in themounting plate 11 (see FIG. 4). AS presently explained, the scoop 62passes from its cocked position, shown in FIG. 5, to its final operatingposition, shown in FIG. 6; in so doing it passes through the quantity ofwetting agent in the container 12. Desirably the container 12 has itsbottom wall formed as a channel 66, as shown in FIG. 3. Said channelaccumulates the last small quantity of the agent and positions it forpick-up by the scoop as it passes through the channel. It also appearsfrom FIGS. 1 and 5 that in the cocked position of the detergentdispenser the scoop 62 is above the cover 17. Also, the externalmounting of the bi-metal member and the triggering block 57 necessitatesthat portions of the wheel 25 and spring 43 are also above the cover.This requires, of course, that the cover have an appropriate aperture asindicated at 67, FIG. 4; said aperture freely accommodates the movementof the scoop 62 therethrough. The aperture 67 affords facility forfilling the cup 12. Specifically, it is located immediately beneath anopening 70 in the top cabinet wall 3. Said opening is 6 normally closedby a screw cap or plug 71. It is contemplated that the dishwasher ownerwould be provided with a syringe-like device, such as the familiarbattery filling syringe, which could be inserted through the open ings70 and 67.

Assume now that the dishwasher, having completed an operating cycle, isbeing prepared for another operation. The detergent container 23 will beinverted (that is, will have rotated counterclockwise more than 180degrees from its FIG. 2 position). The scoop 62 will be as shown in FIG.6 and the detergent cup cover 36 will be in its normal coveringposition. The user will now want to place new charges of detergent inthe respective cups 35.1 and 35.2. He will reach into the open tub,place his thumb in the space 72 between the cups and his fingers on thetop of the cover, and rotate the assembly in a clockwise direction, asviewed from the front of the container. This, of course, is acounterclockwise direction, as viewed in FIGS. 5 and 6. The bi-metalbeing cold, it will be in the unflexed condition, and the web 48 will beresting against the trigger finger 56. Because of the slope of the teeth55, 54, 53, the teeth will click over the finger 56 without difiiculty;and when the detergent container reaches its upright or loadingposition, the triggering mechanism will be as shown in FIG. 5. The cover36 will be inverted as in FIG. 1, and the cups 35.1 and 35.2 ready toreceive detergent. After loading the cups, the cover will be brought toits FIG. 2 position. Dishes are then placed in the tub, the lid 4 isclosed and latched home, and the control device actuated.

During the pro-rinse, or the flush-away rinse as it is sometimes called,no current is sent through the bi-metal and the dispenser is heldagainst operation.

During the admission of water for the first wash, the bi-metal iselectrically activated, whereupon it heats and flexes upwardly.Releasing tooth 53, it comes into the path of tooth 50 as the temporaryrelease of the spring 43 rotates the shaft. As indicated in FIG. 5, thisproduces an abrupt stop after a rapid -degree rotation of the detergentdispenser, placing it in the FIG. 7 position, and permits the detergentto spill out of the cup 35.1. Although there will be a shifting ofdetergent in cup 35.2, there is little if any loss of detergenttherefrom because of the web 34 and the close covering proximity of thecover 36.

Immediately after the first washing operation commences, the bi-metalcircuit is broken and the cooling bimetal moves to its unstressedposition. The finger 56 releases the tooth 50 and comes immediately intothe path of the tooth 54, abruptly halting the escapement wheel afterabout a 30-degree rotation. This movement and abrupt stop shakes looseany detergent remaining in the cup 35.1, but the web 34 of the detergentdispenser is not yet below the rim of the cover 36 and there is againvery little if any loss of detergent from cup 35.2. The scoop arm 52 isthen within the reservoir chamber, but the scoop 62 is not yet into thebody of wetting agent.

The first washing action is completed and the spent washing liquiddischarged from the tub. A second charge of hot water is introduced, andat the commencement of such introduction, the bi-metal 58 is againheated, with the result that the finger 56 disengages from the tooth 54and comes into the path of the tooth 51. The movement of the escapementaction is of the order of 60 degrees and is effective for a completeinversion of the cup 35.2 and release of the detergent content thereof.Once again, the bi-metal is inactivated and withdraws from tooth 51 toengage with tooth 55. This contemplates a rotation of the wheel 25 ofabout 20 degrees. At this time the scoop 62 is substantially verticaland immersed in the wetting agent.

Following the introduction of rinse water, the thermo stat is againheated, whereupon it releases tooth 55 to permit the final rapidmovement of the wheel 25 as deter.- mined by the position of the web 48.During this final movement, the scoop 62 picks up the wetting agent. Theabrupt stopping of scoop 62 when finger 56 reaches web 48 causes theagent to be thrown by momentum, upwardly and toward the cup 63, assuggested in FIG. 6. The.- wetting agent passes into and through thepassage 64!- and enters the tub for mixture with the rinse water duringthe final rinsing operation.

In the schematic wiring diagram of FIG. 8, a conventional timer motor 80rotates a cam shaft 81 through the. usual slip clutch 82 which permitsthe cam shaft to be manually rotated by the control knob 83 withoutdamage to the motor or its gear train (not shown). The cam shaft carriescam C1 which controls the closure of the normally open switch S1; cam C2which controls the; normally open switch S2; cam C3 which controls the;normally open switch S3; cam C4 which controls the normally open switchS4; cam C5 which controls the normally open switch S5; and cam C6 whichcontrols the. normally open switch S6. Switch S1 is in the electricenergy circuit for timer motor 80; switch S2 is in circuit with thewater circulation pump motor 84; switch S3 is im circuit with thesolenoid 85 which operates a solenoich control water inlet valve (notshown) of the conventional type which is closed when the solenoid isdeenergized; switch S4 controls the solenoid 86 of a solenoid-operateddrain valve (not shown) of the conventional type which is open when thesolenoid is deenergized; switch S5 is in the energy circuit of thebi-metal element 58; and switch S6 is in the energy circuit for theheating element 87 which is within the dishwasher tub and may beenergized at various times during the dishwasher operation. However, theheating element 87 is always energized during the drying cycle followingthe final rinse.

The schematic cam chart of FIG. 9 illustrates by the heavy lines theseveral intervals during which the various switches are closed by theirrespective cams. The jagged broken lines which interrupt certain of theclosed-switch designation for the cams C2 and C6 are intended to conveythat the respective switches may be closed for substantially longerperiods than indicated in the figure; and the gap between the verticalbroken lines is intended to suggest that prior to the final rinse thedishwasher may have one or more intermediate rinses, each of which wouldrequire operation of the circulation pump motor, inlet and drain valves,and possibly the heater 87. However, there would be no operation of thebi-metal actuator 58 during these pre-rinse periods.

Assuming the detergent dispenser to have its charge of detergent and theplacement in the dishwasher of the articles to be washed, the usercloses the lid 4 and latches it closed. If the lid is equipped with alatch-operated switch, such as shown in Jellies US. Patent 3,005,065 ofOctober 17, 1961, for example, the closure of the latch closes theswitch 88 in the main power line which is assumed to be the usual 115volt, A.C. domestic system. The user then rotates knob 83 to its onposition. This brings cam C1 to its switch-closing position, energizingthe timer motor 80 for continuous operation during the dishwashing,rinsing and drying cycles. Soon thereafter the timer motor operates camsC2 and C3 to energize circulation pump motor 84, and the inlet valvesolenoid 85; the dishwashing apparatus accomplishes the flush-away rinsecycle. The continued operation through the remaining cycles, previouslydescribed, is apparent from the cam chart.

While there has been described what is at present thought to be thepreferred embodiment of the invention, it will be appreciated that it isintended to cover in the appended claims all modifications which fallWithin the true spirit and scope of the invention.

I claim as my invention:

1. Dispensing apparatus, comprising in combination, a wall structureadapted to be mounted in a location in which one side thereof is exposedto impingement of water thereaganist, a first material containerrotatably mounted relative to said wall adjacent the said one sidethereof, said container having first and second pockets adapted tocontain a quantity of material to be dispensed, a cover normallyshielding said pockets against exposure to water impingement, said coverbeing arranged whereby rotation of said container through a firstpredetermined arc empties said first pocket while said second pocketremains shielded and rotation of said shaft through a secondpredetermined arc empties said second pocket, a second materialcontainer disposed adjacent the opposite surface of said wall to beprotected thereby from water action, a dispensing device operativelyassociated with said second container for abstracting a quantity ofmaterial therefrom, means for rotating said container and saiddispensing device through a succession of arcs in a selected one ofwhich said last-named device removes some material from its associatedcontainer, and means for actuating said shaft rotating means.

2. Dispensing apparatus, comprising, in combination, a Wall structureadapted to be mounted in a location in which one side thereof is exposedto impingement of water thereagainst, a shaft rotatably mounted on saidwall structure and extending therethrough, means remote from said oneside for rotating said shaft in sequence through first and second andthird arcs, a first material container mounted on said shaft outwardlyof the said one side, said container having first and second pocketsadapted to contain a quantity of material to be dispensed, a coverrotaably mounted relative to said container for normally shielding saidpockets against exposure to water impingement, said cover being arrangedwhereby rotation of said shaft through said first arc empties said firstpocket while said second pocket remains shielded and rotation of saidshaft through said second arc empties said second pocket, a secondmaterial container fixed relative to said shaft and disposed outwardlyof the opposite surface of said wall to be protected thereby from wateraction, a dispensing device adapted to be rotated by said shaft forabstracting a quantity of material from said second container onlyduring a selected one of said three arcs of movement, means forconducting said last-named material through said wall, and means foractuating said shaft rotating means.

3. Dispensing apparatus, comprising, in combination, a wall structureadapted to be mounted in a location in which one side thereof is exposedto impingement of water thereagainst, a shaft rotatably mounted on saidwall struc ture and extending therethrough, means for rotating saidshaft in sequence through first and second and third arcs, a firstmaterial container mounted on said shaft adjacent the said one side ofsaid wall structure, said container having first and second open-toppedpockets adapted to contain a quantity of material to be dispensed, acover normally enclosing the open tops of said pockets against entry ofWater, said cover being arranged whereby rotation of said shaft throughsaid first arc empties said first pocket while said second pocketremains covered and rotation of said shaft through said second arcempties said second pocket, said cover, further, being manuallyrotatable to expose said pockets for loading, a second materialcontainer, means for mounting said second container remote from wateraction, a dispensing device for abstracting a quantity of material fromsaid second container during a selected one of said arcs of movement,and means for actuating said shaft rotating means.

4. Dispensing apparatus according to claim 2, in which said firstcontainer comprises a cylindrical structure having open-topped pocketsseparated by a wall radial to the axis of rotation.

5. Dispensing apparatus according to claim 2, in which said secondcontainer includes an arcuate trough receiving material by gravity flowand said dispensing device comprises an arm arranged to sweep throughsaid trough to pick up said material therefrom.

6. Dispensing apparatus, comprising, in combination, a substantiallyimperforate mounting plate, a shaft extending rotatably therethrough, afirst material container fixed to said shaft for rotation therewithadjacent one side of said plate, said container having first and secondopentopped pockets disposed side by side, a second material containerfixed relative to said shaft on the opposite side of said plate, adispensing device fixed on said shaft for passage through said secondcontainer, spring means for effecting rotation of said shaft, means forlatching said shaft against rotation, said latching means releasablyestablishing said first container with the pockets thereof in an uprightposition and said dispensing device in nondispensing position relativeto the material in said second container, mechanism for effecting astep-by-step rotation of said shaft through a total are of more than onehundred eighty degrees, means for effecting a first rotation sufi'icientonly to dump the material from said first container, means for effectinga second rotation sufiicient only to dump the material from secondcontainer, and means for elfecting a third rotation suflicient to causesaid dispensing device to dispense a quantity of material from saidsecond container.

7. Dispensing apparatus according to claim 6, in which said latching andshaft rotating means comprises an escapement mechanism including atriggering finger arranged to effect a controlled rotation thereof.

8. Dispensing apparatus according to claim 7, in which said triggeringfinger is actuated by a lever mechanism arranged to move said fingerbetween first and second positions respectively releasing and engagingsaid escapement mechanism to effect the successive rotations of saidshaft.

'9. Dispensing apparatus according to claim 6, in which said latchingand shaft rotating means comprises an escapement mechanism, and anelectrically energized member for operating said e-scapement mechanismto release said shaft for rotation and to effect the subsequentrotations thereof. I

10. Dispensing apparatus according to claim 9, in which saidelectrically energized member comprises a bimetal element adapted to beheated by passage of electric current therethrough.

11. Dispensing apparatus according to claim 9, in which saidelectrically energized member comprises a bimetal element adapted to beheated by electrical energy.

'12. Dispensing apparatus comprising, in combination, a frame, a shaftrotatably mounted therein, a first material container fixed to saidshaft for rotation therewith, said container being arranged to dischargea first portion of its contents upon rotation through a firstpredetermined arc, and a second portion of its contents upon rotationthrough a second predetermined arc, a second material container fixedrelative to said shaft, a dispensing device rotatable by said shaftthrough said second container for discharging a quantity of materialfrom said second container upon rotation of said shaft through -a thirdare, mechanism for rotating said shaft sequentially through said firstand second and third arcs, and means for actuating said mechanism.

13. Dispensing apparatus, comprising, in combination, a supportstructure including a plate adapted to be mounted on a wall in anenvironment in which one side of said plate is exposed to impingement ofwater thereagainst, a shaft rotatably mounted in said plate andextending therethrough, means for rotating said shaft in sequencethrough first and second and third arcs, a first material containermounted on said shaft adjacent said one side of said plate, saidcontainer having first and second pockets adapted to contain a quantityof material to be dispensed, a cover normally shielding said pocketsagainst exposure to water impingement, said cover being arranged wherebyrotation of said shaft through said first arc empties said first pocketwhile said second pocket remain-s shielded and rotation of said shaftthrough said second are empties said second pocket, a second materialcontainer fixed relative to said shaft and disposed adjacent theopposite side of said plate to be protected thereby from water action, adispensing device mounted on said shaft for movement thereby relative tosaid second container, said dispensing device being arranged to abstracta quantity of material from said second container during one, only, ofsaid arcs of movement of said shaft, means for conducting saidabstracted quantity of material through said plate, and means foractuating said shaft rota-ting means.

14. Dispensing apparatus comprising:

a scoop;

a reservoir for containing a treating agent;

operating mean-s for (1) moving said scoop at a predetermined time froma position within said reservoir in a direction to retain agent withinsaid scoop, and 1(2) abruptly stopping said scoop so as to cause theagent it contains to fiy out by momentum;

a cup-like receiving structure arranged to overflow into said reservoirand having a discharge passage adjacent the bottom thereof, saidreceiving structure being positioned to catch enough of the agent flyingout of said scoop at least to fill said receiving structure;

said scoop having a substantially larger capacity than said receivingstructure thereby to insure discharge of a uniform amount of agentthrough said passage.

15. Dispensing apparatus comprising;

a scoop mounted for rotation in a substantially vertical plane;

a reservoir for containing a treating agent positioned below the axis ofrotation of said scoop;

operating means for (l) abruptly rotating said scoop at a predeterminedtime through an arc from a substantially downward position, where it iswithin said reservoir, upwardly in the direction for retaining agentwithin said scoop and (2) abruptly stopping rotation of said scoop atthe end of said are so as to cause the agent it contains to fly out bymomentum;

a cup-like receiving structure arranged above said reservoir so as tooverflow thereinto, and having a discharge passage adjacent the bottomthereof, said receiving structure being positioned to catch enough ofthe agent flying out of said scoop to fill said receiving structure;

said scoop having a substantially larger capacity than said receivingstructure thereby to insure discharge of a uniform amount through saidpassage.

16. The apparatus defined in claim 15 wherein said scoop is secured on asubstantially horizontally extending shaft, and said opera-ting meanscomprises an escapement mechanism and is arranged to operate said scoopby rotation of said shaft.

*17. Dispensing apparatus comprising, in combination:

a support structure including a wall positioned in an environment inwhich one side of said wall is exposed to impingement of waterthereagainst;

a shaft substantially horizontally mounted in said wall and extendingtherethrough;

means for abruptly rotating said shaft through first and second arcs;

a material container mounted on said shaft on the side of said wallexposed to impingement of water thereagainst, said container beingarranged to discharge its contents during one of the arcuate rotationsof said shaft;

a scoop secured to said shaft on the other side of said wall androtatable in a vertical plane;

a reservoir for containing a treating agent positioned beneath saidshaft, said scoop rotating through said reservoir in a direction toretain agent within said scoop during one of said arcuate rotations ofsaid shaft;

a cup-like receiving structure arranged to overflow into said reservoirand having a discharge passage adjacent the bottom thereof extendingthrough said wall, said receiving structure being positioned to catchenough agent flying out of said scoop by momentum at the end of said onearcuate rotation at least to fill said receiving structure;

said scoop having a substantially larger capacity than said receivingstructure thereby to insure discharge of a uniform amount through saidpassage.

18. Dispensing apparatus comprising:

a support structure;

a shaft rotatably mounted on said support structure;

energy storing and releasing means for causing rotation of said shaftfrom a starting position to a finishing positionj means cooperating withsaid energy storing and releasing means to divide rotation of said shaftinto at least two abrupt arcua-te movements of said-shaft;

a container including a wall forming a pair of cups for containingtreating agent secured to said shaft;

a cover rotatably mounted relative to said support structure and to saidcontainer, said cover being biased to a position wherein it covers saidcups in starting position of said shaft and prevents discharge of theagent in said cups;l

movement of said shaft through a first are causing said first cup tohave its opening move from beneath 12 said cover into exposed positionwhereby the con- 7 tents of said first cup are discharged, movement ofsaid shaft through a second are causing said second cup to have itsopening move from beneath said cover into exposed position so that thecontents thereof are discharged; said container and cover being manuallyrotatable together, after shaft movement to said finishing position toeifect storing of energy in said energy storing means and to return saidcups to their loading position with the cover open, said coverthereafter being manually returnable to its biased position.

References Cited by the Examiner UNITED STATES PATENTS 1,200,269 10/16Talbert 222-369 X 1,801,004 4/31 Holcomb 222-369 2,295,258 9/42 Cann222139 X 2,401,345 6/46 Finney 222369 X 2,532,698 12/50 Corkins 222-139X 2,729,365 1/56 Fettke-ther et a1. 222369 X 3,043,479 7/62 Gaukstern22270 X 3,062,412 11/62 Cushing 222-70 X 3,091,371 5/63 Marx et a1.22270 X M. HENSON WOOD, JR., Primary Examiner.

12. DISPENSING APPARATUS COMPRISING, IN COMBINATION, A FRAME, A SHAFTRATATABLY MOUNTED THEREIN, A FIRST MATERIAL CONTAINER FIXED TO SAIDSHAFT FOR ROTATION THEREWITH, SAID CONTAINER BEING ARRANGED TO DISCHARGEA FIRST PORTION OF ITS CONTENTS UPON ROTATION THROUGH A FIRSTPREDETERMINED ARC, AND A SECOND PORTION OF ITS CONTENTS UPON ROTATIONTHROUGH A SECOND PREDETERMINED ARC, A SECOND MATERIAL CONTAINER FIXEDRELATIVE TO SAID SHAFT, A DISPENSING DEVICE